| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dick Ellsworth | CHN | 8.17 | 196309070_CHN_HOU |
| Bob Friend | PIT | 7.49 | 196309080_SLN_PIT |
| Gary Peters | CHA | 7.33 | 196309090_BAL_CHA |
| Juan Marichal | SFN | 4.24 | 196309070_LAN_SFN |
| Warren Spahn | ATL | 3.03 | 196309080_ATL_PHI |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jay Hook | NYN | -4.86 | 196309080_NYN_CIN |
| Jim Duckworth | TEX | -4.46 | 196309080_CLE_TEX |
| Ray Sadecki | SLN | -2.36 | 196309070_SLN_PIT |
| Jim Bunning | DET | -2.21 | 196309091_DET_TEX |
| Gene Conley | BOS | -1.31 | 196309080_BOS_BAL |
Based on accumulated WAA for this season up to 1963-09-09.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 9.46 | Sandy Koufax | 273.3 | LAN |
| +003+ | 8.51 | Dick Ellsworth | 258.3 | CHN |
| +004+ | 7.87 | Bob Friend | 250 | PIT |
| +005+ | 7.76 | Gary Peters | 221.7 | CHA |
| +011+ | 6.4 | Juan Marichal | 277 | SFN |
| +013+ | 6.15 | Larry Jackson | 247.3 | CHN |
| +018+ | 5.4 | Warren Spahn | 227.7 | ATL |
| +019+ | 5.33 | Juan Pizarro | 215 | CHA |
| +025+ | 4.77 | Jim Bouton | 226.3 | NYA |
| +026+ | 4.63 | Steve Barber | 239.3 | BAL |
| +028+ | 4.5 | Don Drysdale | 284.7 | LAN |
| +029+ | 4.4 | Camilo Pascual | 213.3 | MIN |
| +031+ | 4.38 | Jim Maloney | 221 | CIN |
| +032+ | 4.29 | Curt Simmons | 210.3 | SLN |
| +034+ | 4.13 | Joe Nuxhall | 190 | CIN |
| +036+ | 4.02 | Jim O'Toole | 229.3 | CIN |
| +040+ | 3.76 | Al Downing | 154.7 | NYA |
| +051+ | 3.23 | Lee Stange | 134.7 | MIN |
| +054+ | 3.12 | Bob Veale | 48.3 | PIT |
| +055+ | 3.1 | Denny Lemaster | 212 | ATL |
| +060+ | 3 | Ray Culp | 189.3 | PHI |
| +064+ | 2.85 | Whitey Ford | 236.3 | NYA |
| +067+ | 2.77 | Tom Cheney | 136.7 | TEX |
| +069+ | 2.71 | Milt Pappas | 203 | BAL |
| +076+ | 2.57 | Bob Shaw | 142.3 | ATL |
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